Liquid-fuel burner



J H. GRAY L IQUID FUEL BURNER Original Filed April 21. 1922 3 Sheets-Sheet 1 V 78 782 Qwuewtoz 44 I James/K Gray Dec. 25, 1928. 1,696,196

. J. H. GRAY LIQUID FUEL BURNER I Original Filed April 21. 1922 6 Sheets-Sheet 2 7- iii A WA%YMMWWWWWW WHEN I v avwafltoz ames/ /ray I @QM W Patented Dec. 25 19 28- UNITED. STATES PATENT OFFICE.

JAMES H. GRAY, OI NICE, -I'BANCE.

LIQUID-FUEL BURNER.

Original application filed April 21, 1922,

' ing chambers arranged to direct jets of fuel toward one another to form a thin flat spray and I have also disclosed a burner formed ,7 with a jacket at the extreme end of the nozzle for circulating fuel through the jacket 'tocool the burner. The present application is a division of the above identified application. The invention will be apparent from the following specification when read in connection with the accompanying/ drawings in which- Fig. 1 is a longitudinalsection through the endvof my improved burner showing one type of spray nozzle embodying my invention;

Fig. 2 is a horizontal sectlon on the line 2-2 of Fig.1; v

Fig. 3 is a transverse vertical section on the line 33 of Fig. 1;

Figs. 4 and 5 are face views of parts shown inFigs. 1 and 2; Fig. 4 being a disc as viewed from. line 3-3 of Fig. 1, and Fig. 5 being a yiriew of the member immediately behind said isc; I vFig. 6 is a view similar to Fig. 1 showing means for circulating a greater volume of fuel oil in contact with the spray nozzle'in order to cool the same;

Fig. 7 is a section on line 77 of'Fig. 6; Fig.8 is a section on line 8-8 of Fig. 6;

Figs. 9 and 10 are face views of parts ,164' and 172 shown in the vicinity of the section Fig. 11 is a view'illustrating diagrammatically a side and a top plan view of the spray or flame produced by the nozzlesshown in Figs. 1 and 6.

The burner described in my above identified application is provided with a nozzle having only one outlet orifice therein, such burner being adapted to emit a spray of substantially conical formation. Such a spray is suitable for many purposes. However, in burners used for open hearth furnaces for which no burner is particularly adapted, it is desira le to provide a nozzle capable of emitting a wide flat spray. When injecting a great quantity of fuel into the furnace, it

' is advantageous to so direct the jets that they Serial No. 555,803. Dividedand this application filed August 4, 1927. Serial No. 210,648.

the roof of the furnace. I have, therefore, provided a nozzle which may be used to produce a thin flat flaring spray.

Such a form of nozzle as illustrated ineludes an outer cap 144 which is secured to the end of a head 146 carried by the casing 64. A valve rod 100 carries on its forward end a yoke 148 having oppositely extending fingers 150 which pass through slots 152 formed in needle valve pins 154. The ends of the 'needle valve pins 154 are bevelled as shown and are adapted to co-act with converging tapered chambers 156 formed in a head 158 which head is seated against a shoulder 160 formed in the cap 144. The head 158 is recessed at 162 to receive a disc 164 having slots 166 formed therein which extend tangentially from openings 168 which are'concentric with the inclined valve pins 154. The valve pins are guided in slots 170 formed in a block 172 which is clamped between the head 158 and the plug 146. The block 17 2 is formed with a suitable chamber 17 4 and the plug 146 is chambered at 176 to permit endwise movement of the yoke 148.

The converging arrangement of the valve chambers 156 is such that 'the'jets emitted will impinge on one another so'that the resultant spray is of thin fiat and flaring for- 'mation as illustrated in side elevation and top plan in Fig. 11. This form of spray will produce a flat flame and the burner is positioned in the furnace with the tapered chambers 156; one over the other, so that the greatest dimension w of the flame extends crosswise of the furnace. It is, therefore, clear that the flame will not be directed toward the roof of the furnace and hence there is not the same tendency to break down the roof. as there would be if the flame were of true conical shape and flared upwardly.

In burners delivering a great volume of fuel, it is desirable to provide means for circulating a great volume of cooling medium in contact with the nozzle of the burner. In Figs. 6 and 7, I have illustrated a burner constructed substantiall the same as that shown in Figs. 1 to 5 and t e similar parts in these figures are designated by like reference letters. The chief difference is that member 144 is surrounded by a jacket 186 having front and rear end walls 188 and 189 forming a coolingchamber 190. This chamber is in communication through ports 192 and 194, Fig. 8, with ports 196 and 198 respectively. Port 196 extends approximately 90 degrees around the circumference of the plug 146 and is connected by longitudinal ports 200 leading to the chamber 8i. l -he ports 194: communicate with the arcuate ports 198 formed in the front face of the block 172. The ports 198 communicate with the tangential ports 166 of the disc 164. With this arrangement it will be readily seen that the circulation of the fuel oil is from the chamber 84 through ports 200, ports 192, jacket chamber 190, ports 194 and 198, the tangential slots 166 and past the valve. pins 154 when the same are in their retracted position. When the valve pins are in closed position, all of the fuel flows back through the chamber 110 formed by the tube 104 as indicated by the arrows y in Fig. 6. The volume of fuel fed is such that even when the valve pins 154 are retracted there is a circulation of fuel back through the chamber 110.

\Vhile I have described in considerable detail the certain specific features of the embodiments of the invention illustrated, it is not to be construed that I am limited thereto since changes in arrangement and substitution of equivalents may be made without departure fromthe invention as defined in the appended claims.

What I claim is 1. A burner for liquid fuel comprising a tubular casing, a'spray nozzle secured thereto, a plurality of converging chambers formed in said spray nozzle through which the fuel is adapted to be discharged, a jacket encircling said spray nozzle to form a chamber, ports in said 'acket for permittin a circulation from said casing through sai jacket and to said convergin chambers and needle valve pins for contro ling the discharge of fuel from said converging chambers.

2. A. burner for liquid fuel comprising a tubular casing, a spray nozzle secured thereto, a plurality of converging chambers formed in said spray nozzle through which the fuel is ada ted to be discharged, a jacket' encircling sai spray nozzle to form a chamber, ports in said 'acket for permittin a circulation from sai casing through said j acket and to said convergin chambers and needle valve pins for contro ling the discharge of fuel from said converging chambers and means for simultaneously moving said needle valve pins. 05

3. A burner for liquid fuel comprising a tubular casing, a spray nozzle secured thereto, a plurality of converging chambers formed in said spray nozzle through which the fuel is ada ted to be discharged, means for mechanical y impartim a'whirlin motion to the fuel discharged from sai converging chambers and converging needle valve pins slidable axially of said chambers adapted to control the discharge of fuel from said chambers, said chambers bein opposed so that the jets of fuel discharged t erefrom impinge on each other to form a thin flat spray.

In witness whereof, I have hereunto signed my name.

JAMES H. GRAY. 

